Hello!
Solve for [tex]n[/tex] by taking the cube root of both sides:
[tex]\hookrightarrow\sf{^3 \!\sqrt{n}=^3\!\sqrt{16}}\\\hookrightarrow\sf{n\approx2.5198\dots}[/tex]
Therefore [tex]\sf{n\approx2.5198\dots}[/tex].
Hope it helps! :)
-art lover